Device for changing bobbins in spinning machines



DEVICE FOR CHANGING BOBBINS IN SPINNING MACHINES Filed Dec. 12, 1950 Oct. 7, 1952 CARL-OTTO CHRISTIANSON 3 Sheets-Sheet 1 attorney.

Oct. 7, 1952 CARL-OTTO CHRISTIANSON Filed Dec. 12, 1950 3 Sheets-Sheet 2 Snventor attorney:

DEVICE FOR CHANGING BOBBINS IN SPINNING MACHINES Filed Dec. 12, 1950 Oct. 7, 19 52 CARL-OTTO CHRISTIANS'ON 3 Sheets-Sheet 3 of a spinning machine.

Patented Oct. 7, 1952 DEVICE FOR CHANGING ROBBINS IN SPINNING MACHINES,

Carl-Otto Christianson, Goteborg, Sweden Application December 12, 1950, Serial No. 200,358 v In Sweden August 9, 1949 13 Claims. 1

The change of bobbins in spinning machines is usually effected manually and is rather timewasting and laborious due to the fact that the bobbins often adhere relatively 'firmly to'the spindles. In order to reduce as far as possible the periods of interruptions in the operation of the machine, a relatively large staff of workmen is required. Efforts have been made, therefore, to provide mechanical devices for the bobbin change, but such devices have proved to be rather complicated and not entirely satisiactory'and not suitable for practical service.

It is the object of this invention to provide a bobbin changing device which is simple in construction and highly reliable in operation and which prevents damage of'the yarn on thefull bobbins during the removal thereof.

I attain this object by mechanism illustrated in the accompanying drawings in which:

Fig. 1 is a plan view of a device according to the invention for lifting full bobbins and creeling empty bobbins; Fig. 2 is a sectional view alon the line IIII, Fig. 1; Fig. 3'is a sectional view of a fly frame of a spinning machine having a bobbin changing device according to the invention; and Fig. 4 is a fragmentary plan view showing one bobbin changing device in position to pick up a filled bobbin; Fig. 5 is a fragmentary plan view, with some parts in section, of the bobbin changing apparatus as adjusted to place empty bobbins on the spindles; and Fig. 6 is a fragmentary plan view showing one bobbin changing device in idle position.

be moved upwards in the recesses 4 so as not to prevent the downward movement of the sleeve. When the sleeve 3'has reached the position shown in Fig. 2, the balls 5 will fall down below the yarn, and when the sleeve 3 is lifted, the bobbin I 1 will also be lifted and removed from its spindle.

The balls 5 prevent the lifted bobbin Ii from falling down through the sleeve 3 only if the sleeve is in the position shown in Fig. 2. As will be apparent from the following description, the

sleeve 3 will during the'exchange' of bobbins take other positions than that shown in Fig. 2. -In order to prevent unintentional removal of the bobbins l I, the above namedspring-actuated balls 9 are provided which engage the yarn at a moderate pressure. j

An arm l2 projecting from the sleeve 3 carries a holder for empty bobbins. Said holder comprises a clamping device having two substantially semi-circular legs l3 which are pivotally mounted at M and acted upon by a spring I 5 which tends to move the legs towards eachother. The legs l3 surround a post l6" havingfa substantially Referring to Figs. 1 and 2, numeral I denotes a beam or shaft which extends along the fly frame For each spindle, the beam I carries a bracket 2 which at its freeend merges into a sleeve 3. As will be seen from Fig. 2, recesses 4 are provided insidethe sleeve 3, the depth or width of therecesses decreasing downwardly. In the recesses 4 there are provided balls or rollers 5. In order to prevent the balls from leaving the recesses, a tube 1 having slots 6 is inserted'in the sleeve. The widths of the slots are smaller than the diameters of the balls.

Above the recesses 4, the sleeve has further recesses 8 in which there are provided balls 9 which partly project through openings in the tube l. The balls 9 are subject to the pressure of helical springs ID which maintain the balls in engagement with the edges of said openings.

In Fig. 2, the chain-dotted lines indicate a full bobbin over which the sleeve 3 has been moved downwardly. It will be evident that during the downward movement of the sleeve the .ba1ls5 will semi-circular cross-section; At its upper end, the post carries ahead l in which there is provided a spring l8 acting upon a'stud l 'which is movable in vertical direction and the lower face of which, as viewed in Fig. 2,'is slightly Concave. The legs l3hhave the purpose of grasping the empty bobbin the top of which abuts against the stud I9. During the mounting of the bobbin on the spindle to be described'later on, the spring 18 limits and to a certain extent determines the pressure at which the bobbin is forced downwards against its seat onthe spindle.

Fig. 3 is a sectional view of a fiy frame for a spinning machine provided with a bobbin chan ing device constructed'in accordance with the invention. The fly frametil has secured thereto brackets 3| and 32 serving as "guide members for a rotatable shaft 33 which is also movable in vertical direction. At itsupperendjthe shaft 33 has mounted thereon a crank-like link 34 which at its free end carries the above named beam I by means of a bearing 35 which is pivotally connected with the link 34. A plurality of shafts 33 are provided along the machine, and at least i one of these shafts is adapted to be actuated by a lifting device which in Fig. 3 is representedby a piston 36 connected to thelower end of the shaft 33 and slidable in j yniide 31 having at 7 its lower end a connection 38 for the supply of a fluid under pressure, such as oil. If fluidds supplied to the cylinder, theshaft33 will be lifted so as to lift thebeam I to such'a level that the 3 sleeves 3 which in Fig. 3 are shown in swung out positions, may be swung inwards above the upper ends of the bobbins I I.

In order to secure a uniform lifting movement of the comparatively long beam I, the shafts 33 are, at least along part of their lengths, provided withiteeth' 33a for engagement'with gear wheels 39* fixed to a shaft 40- extending along the machine. In this way, a uniform lifting movement of the beam I is secured.

Below the bracket 32, there is rotatably mounted a gear wheel 4| whichis not rotatable relative to the shaft 33, but permits the shaft of being axially displaced. The gear-wheel 4| engages a rack 42 which extends along the machine and is displaced in opposite directions; by a double-acting piston 45 slidable in a cylinder 45' eitherymanually'or automatically, and the bobhaving connections 41 for the supply of; pressure I fluid in known manner, see Fig. 5. By displacing the rack 42, the. gear wheel 4I- andthe shaft 33 can be turned soas. to swing. the links 34and to move. the beam I ina horizontal plane.

A bracket 48 is securedtoa bearing near one end ofthe beam I, see Fig. 5, and supports a cylinder for.a.double-acting piston 50. 'The piston rod is provided with arack 5 I -in mesh with a gear wheelitkeyed onv the beam I, the arrangement being such. that. an actuation of the piston 50 rotates thebeam I through an angle of substantially 180..between two. end positions.

One of these Dositions,.the idleposition, is illustrated in Fig. 3 inlwhich the sleeve. 3 and the holder I3.I9 forempty-bobbins are located up.- side' down as compared with theoperative position shown in Fig. 2 which is obtained by. swinging. the beam I through an angle of 180 in an anti-clockwise. direction. as .viewed in Fig. 3.

The mode of operation willnow be described, referencebeing alsohad'to Figs. 4-to 6. If it be assumed that the. bobbins of the machine are full and empty bobbins are mounted on the holders. I3 to IS in the-manner indicated in Fig. 3, fluid under pressure is supplied to the. cylinder 31. As a result thereoLthe beam I is liftedto a position slightly. abovethetops of the-bobbins I I. Then.the beam I is swung inacounterclockwise direction throu h an angle of 180 by the. piston 50, the sleevesL3 then. being. coaxial with respect to their appertaining, spindles. ThisJposition is indicatedin Fig. 4 in.which.the axis oijthe spindle is diagrammatically represented bya cross A. 'If then the fluid underpressure is discharged from the cylinder 31, the-parts will'slide downwardsby their own weight, the sleeves 3 being moveddown over the bobbins I I soasfin'ally to take the position shown in Fig. 2. Thereupon, fluid under pressure is again supplied into the cylinder '31. As a result thereof, the beam I will be lifted and thebobbins removed from the spindles. When the lower edge-of the bobbins hasmoved above the tops of the spindles, the rack 42 is actuated so as to swing the links 34- from' .the' position shown in-Fig. 4 into the position illustrated in Fig. 5, that is, through an angle of somewhat less than 90. In this position," each holder I3 to Is is coaxial with respect to its spindle. It now the beam I is-lowered, the empty bobbins'will be put onto the spindles. The downward' movementiof the beam I is limitedinza manner such that the spring I8 inthe-head l'lof the. holderiis compressed merely to a-certainextent so as to prevent any of the bobbins -from*beingforced too firmly onto the spindles.

If the links 34 are: swung in-a counterclockwise direction from the position shown in Fig: 5 after bins may be collected in a carriage running along the machine, andempty bobbins may be mounted on the holders so as to be ready for the next changing operation.

'It'will be obvious that the details of construction-maybe modified within the scope of the appending claims.

What I claimis:

1. A. device f for changing .bobbins on the, spindles. of spinning. machines. comprising a sleeve, locking .meansin saidfsleeve, and means lifting and lowering said sleeve .to telescope 'the same over a fullb'obbin ona spindle, said locking means. being rolling elements. constituting a oneway, clutch-constructed. and. arranged to permit said sleeve. being moved downward over .a. full bobbin and to engagelthewinding .on'ithe. bobbin upon. upward .movenient..of,1the sleeve .to lift said full bobbin from its spindle. during upward movement of the sleeve.

2..A device, for-. changing bobbins on -the spindles of ,splnning. machines, comprising ..a sleeve having inner axialtanerin recesses. balls in said recesses,.and meanslifting. and-lowering said sleeve to telescope the same. over a full bobbin on a spindle, said balls-being arrangedinsaid recesses to permitsaid sleevebeingmoved downwardovera fullbobbin and to engage 'thewinding on said bobbinup'on" upwardmovement. of the sleeve t'offlift. said;b'obbin from its spindle during upwardmovementof the sleeve.

3..A .devicefor changing. bobbins-on .the spindles of spinning, machines, comprising ..a sleeve having inner. amaltapering recessesr balls in saidrecesses,.said recesses-having edges retaining said. balls. in. .the. recesses, and means lifting and. lowering. said sleeve .to telescope. the .same

' over. .a full bobbin on. a. spindle, said balls. being arranged in. said recessesto, permit, said sleeve being moved downward ovenaiull bobbin and to engage the windingon said bobbimuponupward movement. of the sleeve. to .lift said bobbin from its spindle duringgupward=.movementof the sleeve.

4. A device for. changing bobbins on the spindles of spinning machines, comprising a bracket carryinga sleeve anda holder for an emptybobbin,'said. sleeve having inner axialltapering recesses, balls in said recesses, a tubein said sleeve. said-tube having axial slots narrower .thanl'the diameter ofsaid: balls; means liitingand lowering said bracket to telescopesaid. sleeve oitalternatively said bobbinholder over a spindleand'means for moving'said" bracket to positionsaid sieeve'or alternatively Said bobbin 'hblder' above and. 'in axial alinement with a spindle, said balls. being arranged in said: recesses to; permit said sleeve being moved downward-over a: full-bobbin and to engage the winding on said'bobbin'zupon upward movement of the sleeve. to liftsaidbobbin" from its spindle during'upward movement of the sleeve, said holder including bobbin-gripping means yieldable upon lateral-movementof-said bracket a'ter lowering thereof- 'to place an empty bobbin on the spindle to'releasethe'bobbinv 5. A device for-changing bobbins on the spindles of spinning machines, comprising a sleeve having inner axial tapering recesses, balls in said recesses, resilient'means projecting inwardly in said sleeve for frictional engagement with a full bobbin surrounded by said sleeve, and means lifting and-loweringsaid sleeve to-telescope the same over a full bobbin on a:spindle,,said .balls being arranged inl said .recesses to permit said sleeve being moved downward over a'full bobbin andfto engage the winding on said bobbin upon upward movement of the sleeve to lift said bobbin from its spindle during upward movement of the sleeve.

v 6. A device for changing bobbins on the spindles of a spinning machine, comprising a beam extending along said machine, means for lifting and lowering said beam, a number of sleeves connected with said beam for telescoping movement thereby over full bobbins on spindles, locking means in each sleeve, said locking means being constructed and. arranged to permit said sleeves being moved downward over full bobbins and to engage the windings onsaid bobbins upon upward movements of the sleeves to lift said full bobbins from their spindles during the upward movement of the sleeves, a number of holders for empty bobbins, said holders being connected with said beam, and means for moving said beam to telescope said holders over said spindles and to lift the same therefrom thereby to place empty bobbins on said spindles.

extending along said machine, means for lifting v and lowering said beam, a number of sleeves connected with said beam for telescoping movement thereby over full bobbins on spindles, locking means in each sleeve, said locking means being constructed and arranged to permit said sleeves being moved downward over full bobbins and to engage the windings on said bobbins upon upward movements of the sleeves to lift said full bobbins from their spindles during the upward movement of the sleeves, a number of holders for empty bobbins, said holders being rigidly connected with said sleeves and movable together therewith, and means for moving said beam to telescope said holders over said spindles and to lift the same therefrom thereby to place empty bobbins on said spindles.

8. A device for changing bobbins on the spindles of a spinning machine, comprising a beam extending along said machine, means for lifting and lowering said beam, a number of sleeves connected with said beam for telescoping movement thereby over full bobbins on spindles, locking means in each sleeve, said locking means being constructed and arranged to permit said sleeves being moved downward over full bobbins and to engage the windings on said bobbins upon upward movements of the sleeves to lift said full bobbins from their spindles during the upward movement of the sleeves, a number of holders for empty bobbins, said holders being connected with said beam and arranged to maintain emptybobbins in positions parallel to the axes of said sleeves, and means for moving said beam to telescope said holders over said spindles and to lift the same therefrom, thereby to place empty bobbins on said spindles.

9. A device for changing bobbins on the spindles of a spinning machine, comprising a beam extending-along; said machinmeans -fo'r lifting and lowering said beamja" number-"of sleeves connectedfwith I said beam for telescoping movement' thereby over-full bobbins' on spindles, looking means in eachsleeve, saidlocking means beingjconstructed and arranged toper mit said sleevesbeing gnoved downward 'o'ver full bobbins and t'o engage v the windings on said bobbi'ns upon" upward movements 0fthe sleeves to lift said full bobbins -fi" in theirspindle'"" cluring the upward movefne of 1 the sleeve's'; a -number of holders -for nipt bobbins, eachholde'r coinprising-a '-re's'ilient" clampingmember for empty bobbin, andmeaiis 'for movingsaid-beam', sleeves and holders at right angles to the axes of said spindles to position said sleeves or alternatively said holders above and in axial alinement with said spindles.

10. A devicefor changing bobbins on the spindles of a spinning machine, comprising a beam extending along said machine, means for lifting and lowering said beam, a number of sleeves connected with said beam for telescoping movement thereby over full bobbins on spindles, locking means in each sleeve, said locking means being constructed and arranged to permit said sleeves being moved downward over full bobbins and to engage the windings on said bobbins upon upward movements of the sleeves to lift said full bobbins from their spindles during the upward movement of the sleeves, a number of holders for empty bobbins, saidholders being connected with said beam, each holder comprising a resilient clamping member for an empty bobbin, and means for moving said beam towards and away from said spindles.

11. A device for changing bobbins on the spindles of a spinning machine, comprising a beam ing member for an empty bobbin, and means for moving said beam longitudinally of its axis and towards and away from spindles.

12. A device for changing bobbins on the spindies of a spinning machine, comprising a beam extending along said machine, means for lifting and lowering said beam, a number of sleeve connected with said beam for telescoping movement thereby over full bobbins on spindles, locking means in each sleeve, said locking means being constructed and arranged to permit said sleeves being moved downward over full bobbins and to engage the windings on said bobbins upon upward movements of the sleeves to lift said full bobbins from their spindles during the upward movement of the sleeves, a number of holders for empty bobbins, said holders being connected with said beam, each holder comprising a resilient clamping member for an empty bobbin, means for turning said beam about its axis, and means for moving said beam longitudinally of its axis and towards and away from said spindles.

13. A device for changing bobbins on the spindles of a spinning machine, comprising a beam' 

